Question

Which one of the following statements about energy is correct?a.We convert about 99% of our food energy to useful work.b.A leaf falling from a tree represents potential energy.c.Chemical energy is a form of kinetic energy.d.Energy cannot be created or destroyed.e.Entropy is the movement of molecules from areas of higher concentration to areas of lower concentration.

Answer 1

Answer:

Option (D)

Explanation:

Energy is usually defined as the capacity or ability to perform work, by applying a certain amount of force. For example, moving a large mass of rock by applying some force, signifies energy.

This energy typically occurs in different forms such as electrical energy, chemical energy, potential energy, kinetic energy, thermal energy and so on.

From the first law of thermodynamics, it can be concluded that energy cannot be generated or demolished. It can only be transferred from one form to another.

Thus, the correct answer is option (D).